Phonograph-recorder.



No. 802,212. PAT-ENTEI) OUT. 17, 1905. U. L. HIBBARD.

PHONOGRAPH RECORDER.

APPLICATION FILED FEB.15.1905

In venmr; 54 5 W IIITE ill ST PATENT CHARLES L. HIBBARD, OF ORANGE, NEW JERSEY, ASSIGNOR TO NEIV JERSEY PATENT COMPANY, OF ORANGE, NEW JERSEY, A CORPO- RATION OF NEW JERSEY.

PHONOGRAPH-RECORDEH.

Specification of Letters Patent.

Patented Oct. 17, 1905.

Application filed February 15, 1905. Serial No. 245,650.

T at whom it may concern.-

Be it known that I, CHARLES L. HIBBARD, a citizen of the United States,residing at Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Pl1onograph-Recorders, of which the followingis a specification.

My invention relates to recorders which comprise a cutting-stylus. preferably in the form of a small cylinder having a circular cutting edge, which stylus is held in a socket formed usually of light flexible metal, such as aluminium. In recorders of this type as heretofore made the metal s0cket-piece has been provided with a flat portion, which is secured to the lower surface of the diaphragm by shellac or other adhesive material. This structure is defective, for the reason that the stylus-holder is extremely likely to become detached from the diaphragm, since it occupies an exposed position and is not securely held.

My invention has for its object the provision of a recorder of this type which will be cheap and easy to manufacture and which will be free from the defect pointed out.

Reference is hereby made to the accompanying drawings, in which the same referencenumerals indicate corresponding parts in the several views, of which Figure 1 is a plan view of the diaphragm which I prefer to use in the construction of the recorder. Figs. 2, 3, and 4 are plan, side elevation, and front elevation, respectively, of the diaphragm and stylus-holder in their assembled relations. Fig. 5 is a section on the line 5 5 of Fig. 2.

The diaphragm 1 may be of any suitable material, such as glass or mica, circular in form, and provided with a perforation 2. This perforation is preferably situated eccentrically, for the purpose which will appear later. The periphery of the diaphragm is provided with a projection 3, as shown, which is usually in line with the perforation 2 and the center of the disk, as shown in Fig. 1, although not necessarily so. The stylusholder I is formed by bending a thinsheet of a flexible metal, such as aluminium, to form a socket 5, a vertical web of two thicknesses 6 6, and lateral wings 7 7. In practice it is found that owing to the exposed position of thereto.

the stylus accidental blows caused by careless handling tend to force the stylus out of the socket 5 and between the two thicknesses 6. In order to prevent this, I unite the said thicknesses by means of a suitable solder 9. The thickness of the solder is greatly exaggerated in Figs. 4: and 5. In practice the webs 6 are pressed closely together, and the solder is sweated in. In order to provide means for securing the stylus-holder to the diaphragm, the webs 7 are slitted, as shown in Fig. 2, to form integral tongues 8, which are passed through the aperture 2 and bent into the positions shown in Figs. 4 and 5. The holder is thus provided with a flat surface on each side of the diaphragm and is firmly clamped Shellac or other cement applied between both sides of the diaphragm and the holder secures the holder more firmly and prevents any possible lateral movement.

When in its operative position, the holder is preferably situated so that the cutting edge of the stylus will be in line with the axis of the diaphragm. tion 2 is eccentric thereto, the degree of eccentricity depending upon the location of the securing-tongues 8. In order that the stylusholder may be readily placed in such position as to bring the stylus in line with the center of the disk, the projection 3 is provided as a gage or alining-stop. Preferably this projection is in line with the center of the diaphragm and the perforation 2, so that after the tongues 8 of the diaphragm-l'lolder are passed through the opening the holder may be positioned by means of the projection 3 before it is secured to the diaphragm by means of coment. (See Fig. 2.) The projection 3 and the end of the stylus-holder may then be out off, so that the diaphragm will be a perfect circle.

Having now described my invention, whatI claim as new therein, and desire to secure by Letters Patent, is

1. As a new article of manufacture, a talking-machine diaphragm consisting of a circular disk having an eccentric perforation and a peripheral projection, substantially as set forth.

2. As a new article of manufacture, a talking-machine diaphragm consisting of a circular disk having an eccentric perforation and a peripheral projection in line with said perfora- For this reason the perforaslit to form fastening-tongues, substantially as set forth.

5. In a phonograph-recorder, a diaphragm,

a stylus-holder secured thereto and consisting of a single piece of flexible metal passed through said diaphragm and having portions bearing against both faces thereof, substantially as set forth.

This specification signed and witnessed this 10th day of February, 1905.

CHARLES L. HIBBARD. Witnesses:

FRANK L. DYER, ANNA R. KLEHM. 

